Transistor breakdown (CB21393E)

This inverse transistor breakdown circuit was found in a 1967 documentation. It applies to modern components.

1 MHz Oscillator (CB21981E)
This oscillator with the CA3130 was obtained from an English publication from 1977. The circuit does...
Microammeter with 741 (CB4424E)
This traditional circuit of old documentation uses a 0-1 mA milliammeter and has several scales....
Simple zener diode test (CB20740E)
This circuit uses a fixed source that has a higher voltage than the zener diode that will be...